Chapter 57 [XXIX.]—The Good of Marriage; Four Different Cases of the Good and the Evil Use of Matrimony.

The good, then, of marriage lies not in the passion of desire, but in a certain legitimate and honourable measure in using
that passion, appropriate to the propagation of children, not the gratification of lust.410410 [The editions, but apparently no Mss., add here the somewhat sententious words: “Voluntas ista, non voluptas illa, nuptialis est,”—which may, perhaps, be rendered:
“Wedded desire is willingness, not wantonness.”—W.] That, therefore, which is disobediently excited in the members of the body of this death, and endeavours to draw into itself
our whole fallen soul, (neither arising nor subsiding at the bidding of the mind), is that evil of sin in which every man
is born. When, however, it is curbed from unlawful desires, and is permitted only for the orderly propagation and renewal
of the human race, this is the good of wedlock, by which man is born in the union that is appointed. Nobody,
however, is born again in Christ’s body, unless he be previously born in the body of sin. But inasmuch as it is evil to make
a bad use of a good thing, so is it good to use well a bad thing. These two ideas therefore of good and evil, and those other two of a good use and an evil use, when they are duly combined together, produce four different conditions:—[1] A man makes a good use of a good thing, when
he dedicates his continence to God; [2.] He makes a bad use of
a good thing, when he dedicates his continence to an idol; [3.] He makes a bad use of an evil thing, when he loosely gratifies
his concupiscence by adultery; [4.] He makes a good use of an evil thing, when he restrains his concupiscence by matrimony.
Now, as it is better to make good use of a good thing than to make good rise of an evil thing,—since both are good,—so “he
that giveth his virgin in marriage doeth well; but he that giveth her not in marriage doeth better.”
4114111 Cor. vii. 38. This question, indeed, I have treated at greater length, and more sufficiently, as God enabled me according to my humble
abilities, in two works of mine,—one of them, On the Good of Marriage, and the other, On Holy Virginity. They, therefore,
who extol the flesh and blood of a sinful creature, to the prejudice of the Redeemer’s flesh and blood, must not defend the
evil of concupiscence through the good of marriage; nor should they, from whose infant age the Lord has
inculcated in us a lesson of humility,412412Matt. xviii. 4. be lifted up into pride by the error of others. He only was born without sin whom a virgin conceived without the embrace
of a husband,—not by the concupiscence of the flesh, but by the chaste submission of her mind.413413Luke i. 34, 38. She alone was able to give birth to One who should heal our wound, who brought forth the germ of a pure offspring without
the wound of sin.